package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.val;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前端传过来的密码进行md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }
    /**
     * 新增员工
     * @param
     * @return
     */
    public void save(EmployeeDTO employeeDTO){
        System.out.println("当前线程的Id"+Thread.currentThread().getId());

        //保存到持久层还是得需要Employee类，新建议Employee对象
        Employee employee = new Employee();
        //将EmployeeDTO中的数据保存到Employee对象中，使用get和set方法太过于繁琐
        //使用对象属性拷贝,使用前提，属性名已知
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置属性状态
        employee.setStatus(StatusConstant.ENABLE);
        //设置默认密码,md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //创建时间
        employee.setCreateTime(LocalDateTime.now());
        //更新时间
        employee.setUpdateTime(LocalDateTime.now());
        //设置当前记录创建人id和修改人
        // TODO 后期改为当前用户登录的id
        Long empId = BaseContext.getCurrentId();
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);
//        调用持久层，保存数据
        employeeMapper.insert(employee);
    }

    /**
     * 在分页查询的时候使用动态sql语句，静态sql语句不太方便
     * 使用动态sql需要配置文件
     * @param employeePageQueryDTO
     * @return
     */

    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO){
        //select * from employee limit 0,10
        //使用pageHelper帮助完成分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        Page<Employee> page= employeeMapper.pageQuery(employeePageQueryDTO);
            long total = page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total,records);
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id){
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.update(employee);
    }

    /**
     *
     * @param id
     * @return
     */
    public Employee gerById(Long id){
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("*****");
        return employee;
    }

    /**
     *
     * @param employeeDTO
     */
    public void update(EmployeeDTO employeeDTO){
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }
}
